EP4149188A1

EP4149188A1 - Frequency domain resource allocation method and device

Info

Publication number: EP4149188A1
Application number: EP21800609.6A
Authority: EP
Inventors: Gen LI; Zichao JI; Siqi LIU
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-05-08
Filing date: 2021-05-06
Publication date: 2023-03-15
Also published as: KR20230008187A; WO2021223703A1; EP4149188A4; CN113630874A; US20230073686A1

Abstract

Embodiments of the present invention provide a frequency domain resource allocation method and a device. The method includes: receiving first downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts; and obtaining frequency domain resources of a terminal on the plurality of carriers, cells, or bandwidth parts according to the first downlink control information, a quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and a frequency domain resource group corresponding to each bit.

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Chinese Patent Application No. 202010383541.2, filed on May 8, 2020 in China, which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

Embodiments of the present invention relate to the field of communications technologies, and in particular, to a frequency domain resource allocation method and a device.

BACKGROUND

In a current new radio (New Radio, NR) system, a plurality of carriers cannot be scheduled by using one piece of downlink control information (Downlink Control Information, DCI). In a dynamic spectrum sharing (Dynamic Spectrum Sharing, DSS) scenario, scheduling a plurality of carriers by using one piece of DCI can effectively reduce overheads (overhead) of a physical downlink control channel (Physical Downlink Control Channel, PDCCH).
However, in a scenario in which a plurality of carriers, cells, or bandwidth parts (Bandwidth Part, BWP) are scheduled by using one piece of DCI, the large quantity of bits are required for frequency domain resource allocation. If the plurality of carriers, cells, or BWPs separately use respective frequency domain resource allocation fields, overheads of the frequency domain resource allocation fields are heavy and a final size (size) of the DCI may be excessively large.

SUMMARY

An objective of embodiments of the present invention is to provide a frequency domain resource allocation method and a device, to resolve a problem that overheads of a frequency domain resource allocation field are relatively heavy.
According to a first aspect, an embodiment of the present invention provides a frequency domain resource allocation method, applied to a terminal and including:

receiving first downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts; and
obtaining frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to the first downlink control information, a quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and a frequency domain resource group corresponding to each bit.

According to a second aspect, an embodiment of the present invention provides a frequency domain resource allocation method, applied to a network device and including:

sending first downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts, where
the first downlink control information is used to instruct a terminal to obtain frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to the first downlink control information, a quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and a frequency domain resource group corresponding to each bit.

According to a third aspect, an embodiment of the present invention provides a frequency domain resource allocation method, applied to a terminal and including:

receiving second downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts; and
obtaining frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to a frequency domain resource allocation field in the second downlink control information, where
the frequency domain resource allocation field includes an index corresponding to a frequency domain resource allocation bitmap or an index corresponding to a frequency domain resource set, and the frequency domain resource set meets a preset condition.

According to a fourth aspect, an embodiment of the present invention provides a frequency domain resource allocation method, applied to a network device and including:

sending second downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts, where
a frequency domain resource allocation field in the second downlink control information includes an index corresponding to a frequency domain resource allocation bitmap or an index corresponding to a frequency domain resource set, and the frequency domain resource set meets a preset condition.

According to a fifth aspect, an embodiment of the present invention provides a terminal, including:

a first receiving module, configured to receive first downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts; and
a first processing module, configured to obtain frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to the first downlink control information, a quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and a frequency domain resource group corresponding to each bit.

Optionally, the terminal further includes: a second processing module, configured to determine a frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts; and
a third processing module, configured to obtain, according to the frequency domain resource group size, the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part and/or the frequency domain resource group corresponding to each bit.
Optionally, the frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts is configured by a network side.
Optionally, the second processing module is further configured to obtain the frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts according to a correspondence between a frequency domain resource quantity and a frequency domain resource group size and a first quantity, where
the first quantity includes any one of the following:

a total frequency domain resource quantity of the plurality of carriers;
a total frequency domain resource quantity of the plurality of cells;
a total frequency domain resource quantity of the plurality of bandwidth parts;
a maximum frequency domain resource quantity or a minimum frequency domain resource quantity of at least a part of carriers in the plurality of carriers;
a maximum frequency domain resource quantity or a minimum frequency domain resource quantity of at least a part of cells in the plurality of cells; and
a maximum frequency domain resource quantity or a minimum frequency domain resource quantity of at least a part of bandwidth parts in the plurality of bandwidth parts.

Optionally, the terminal further includes:

a fourth processing module, configured to obtain a frequency domain resource group size of each scheduled carrier, cell, or bandwidth part according to a frequency domain resource quantity of each scheduled carrier, cell, or bandwidth part;
a fifth processing module, configured to perform scaling processing on the frequency domain resource group size of each scheduled carrier, cell, or bandwidth part; and
a sixth processing module, configured to obtain according to a scaled frequency domain resource group size of each scheduled carrier, cell, or bandwidth part, the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part and/or the frequency domain resource group corresponding to each bit.

Optionally, the fifth processing module is further configured to perform scaling processing on the frequency domain resource group size of each scheduled carrier, cell, or bandwidth part according to a scaling coefficient, where
the scaling coefficient is agreed in a protocol, or the scaling coefficient is configured by a network side, or the scaling coefficient is obtained according to a quantity of carriers, cells, or bandwidth parts scheduled by using the first downlink control information.
Optionally, a size of a frequency domain resource allocation indication field of the first downlink control information is ∑Ni, where Ni is a frequency domain resource allocation bitmap size determined based on a frequency domain resource group size of the i-th scheduled carrier, cell, or bandwidth part, and i is a natural number.
Optionally, the frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts include any one of the following:

frequency domain resources jointly allocated for the terminal on the plurality of carriers;
frequency domain resources jointly allocated for the terminal on the plurality of cells;
frequency domain resources jointly allocated for the terminal on the plurality of bandwidth parts;
frequency domain resources allocated for the terminal on each of the plurality of carriers;
frequency domain resources allocated for the terminal on each of the plurality of cells; and
frequency domain resources allocated for the terminal on each of the plurality of bandwidth parts.

According to a sixth aspect, an embodiment of the present invention provides a network device, including:

a first sending module, configured to send first downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts, where
the first downlink control information is used to instruct a terminal to obtain frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to the first downlink control information, a quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and a frequency domain resource group corresponding to each bit.

Optionally, the network device further includes:
a determining module, configured to determine the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and the frequency domain resource group corresponding to each bit.
Optionally, the network device further includes:

an eighth processing module, configured to determine a frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts; and
a ninth processing module, configured to obtain, according to the frequency domain resource group size, the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part and/or the frequency domain resource group corresponding to each bit.

Optionally, the eighth processing module is further configured to obtain the frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts according to a correspondence between a frequency domain resource quantity and a frequency domain resource group size and a first quantity, where the first quantity includes any one of the following:

Optionally, the network device further includes:

a tenth processing module, configured to obtain a frequency domain resource group size of the carrier, cell, or bandwidth part according to a frequency domain resource quantity of each scheduled carrier, cell, or bandwidth part;
an eleventh processing module, configured to perform scaling processing on the frequency domain resource group size of each scheduled carrier, cell, or bandwidth part; and
a twelfth processing module, configured to obtain, according to a scaled frequency domain resource group size of the carrier, cell, or bandwidth part, the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part and/or the frequency domain resource group corresponding to each bit.

Optionally, the eleventh processing module is further configured to perform scaling processing on the frequency domain resource group size of each scheduled carrier, cell, or bandwidth part according to a scaling coefficient, where
the scaling coefficient is agreed in a protocol, or the scaling coefficient is configured by a network side, or the scaling coefficient is obtained according to a quantity of carriers, cells, or bandwidth parts scheduled by using the first downlink control information.
Optionally, a size of a frequency domain resource allocation indication field of the first downlink control information is ∑Ni, where Ni is a frequency domain resource allocation bitmap size determined based on a frequency domain resource group size of the i-th scheduled carrier, cell, or bandwidth part, and i is a natural number.
According to a seventh aspect, an embodiment of the present invention provides a terminal, including:

a second receiving module, configured to receive second downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts; and
a thirteenth processing module, configured to obtain frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to a frequency domain resource allocation field in the second downlink control information, where
the frequency domain resource allocation field includes an index of a frequency domain resource allocation bitmap or an index of a frequency domain resource set, and the frequency domain resource set meets a preset condition.

Optionally, the terminal further includes:
a third receiving module, configured to: receive a resource indication value list configured by a network device for each scheduled carrier, cell, or bandwidth part, where the index represents a location of the frequency domain resource allocation bitmap in the resource indication value list; or receive a resource indication value list jointly configured by a network device for the plurality of carriers, cells, or bandwidth parts, where the index represents a location of the frequency domain resource allocation bitmap in the jointly configured resource indication value list.
Optionally, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the resource indication value list configured for each carrier, cell, or bandwidth part; or a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the jointly configured resource indication value list.
Optionally, the frequency domain resource allocation bitmap indicates a frequency domain resource allocated for the terminal on one carrier, cell, or bandwidth part, or indicates frequency domain resources jointly allocated for the terminal on the plurality of carriers, cells, or bandwidth parts.
Optionally, the preset condition includes one or more of the following:

a quantity of frequency domain resources in the frequency domain resource set being greater than or equal to a first preset value;
a ratio of the quantity of frequency domain resources in the frequency domain resource set to a quantity of allocable frequency domain resources on a carrier, cell, or bandwidth part being greater than or equal to a second preset value; and
frequency domain resources in the frequency domain resource set being discontinuous frequency domain resources.

Optionally, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource sets.
Optionally, the index of the frequency domain resource set indicates that the frequency domain resource set is arranged in ascending order or descending order according to a length of a corresponding bitmap.
According to an eighth aspect, an embodiment of the present invention provides a network device, including:

a second sending module, configured to send second downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts, where
a frequency domain resource allocation field in the second downlink control information includes an index of a frequency domain resource allocation bitmap or an index of a frequency domain resource set, and the frequency domain resource set meets a preset condition.

Optionally, the network device further includes:
a third sending module, configured to: send a resource indication value list configured for each scheduled carrier, cell, or bandwidth part, where the index represents a location of the frequency domain resource allocation bitmap in the resource indication value list; or send a resource indication value list jointly configured for the plurality of carriers, cells, or bandwidth parts, where the index represents a location of the frequency domain resource allocation bitmap in the jointly configured resource indication value list.
Optionally, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the resource indication value list configured for each carrier, cell, or bandwidth part; or a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the jointly configured resource indication value list.
Optionally, the preset condition includes one or more of the following:

Optionally, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource sets.
Optionally, the index of the frequency domain resource set indicates that the frequency domain resource set is arranged in ascending order or descending order according to a length of a corresponding bitmap.
According to a ninth aspect, an embodiment of the present invention provides a communications device, including a processor, a memory, and a program stored in the memory and executable on the processor, where when the program is executed by the processor, the steps of the frequency domain resource allocation method in the first aspect, the second aspect, or the third aspect are implemented.
According to a tenth aspect, an embodiment of the present invention provides a readable storage medium. The readable storage medium stores a program, and when the program is executed by a processor, the steps of the frequency domain resource allocation method in the first aspect, the second aspect, or the third aspect are implemented.
According to an eleventh aspect, an embodiment of this application provides a chip. The chip includes a processor and a communications interface, the communications interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement the method in the first aspect, the second aspect, or the third aspect.
In the embodiments of the present invention, resource overheads of a control channel can be reduced, and demodulation performance of the control channel and effective coverage of a system can be improved.

BRIEF DESCRIPTION OF DRAWINGS

It becomes clear for persons skilled in the art to learn various other advantages and benefits by reading detailed description of the following implementations. Accompanying drawings are merely used for showing the preferred implementation manners, but not considered as a limitation on the present invention. In all accompanying drawings, a same reference symbol is used to indicate a same part. In the accompanying drawings:

FIG. 1 is a schematic architectural diagram of a communications system according to an embodiment of the present invention;
FIG. 2 is a first flowchart of a frequency domain resource allocation method according to an embodiment of the present invention;
FIG. 3 is a second flowchart of a frequency domain resource allocation method according to an embodiment of the present invention;
FIG. 4 is a third flowchart of a frequency domain resource allocation method according to an embodiment of the present invention;
FIG. 5 is a fourth flowchart of a frequency domain resource allocation method according to an embodiment of the present invention;
FIG. 6 is a first schematic diagram of a terminal according to an embodiment of the present invention;
FIG. 7 is a first schematic diagram of a network device according to an embodiment of the present invention;
FIG. 8 is a second schematic diagram of a terminal according to an embodiment of the present invention;
FIG. 9 is a second schematic diagram of a network device according to an embodiment of the present invention; and
FIG. 10 is a schematic diagram of a communications device according to an embodiment of the present invention.

DESCRIPTION OF EMBODIMENTS

To facilitate understanding of embodiments of the present invention, the following technical points are first described:

(1) Downlink frequency domain resource allocation in NR

In NR, there are two types of resource blocks (Resource Block, RB): a physical resource block (Physical Resource Block, PRB) and a virtual resource block (Virtual Resource Block, VRB). For frequency domain resources of a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) with a bandwidth of $N_{BWP}^{size}$
, there are $N_{BWP}^{size}$
VRBs and PRBs numbered from 0 to $N_{BWP}^{size} - 1$
. In resource allocation of the PDSCH, there are two VRB-to-PRB mapping modes: non-interleaved (Non-interleaved) and interleaved (interleaved).
Frequency domain resource allocation of a PDSCH in NR is indicated by a frequency domain resource allocation (Frequency Domain Resource Allocation, FDRA) field of DCI, that is, an index value of a VRB of the PDSCH in a downlink BWP.
Two resource allocation types are supported: Type 0 (Type 0) (discontinuous frequency domain resource allocation) and Type 1 (Type 1) (continuous frequency domain resource allocation).
Only the Type 1 frequency domain resource allocation type is supported by DCI 1_0, and one bit (bit) indicates a mapping between a VRB to a PRB.
The Type 0 or Type 1 frequency domain resource allocation type can be supported by DCI 1_1, and a higher layer may be configured as Type 0 or Type 1, or a higher layer may be configured as a dynamic switch (Dynamic Switch) mode and a resource allocation type is indicated by using high 1 bit of a FDRA field of DCI 1_1. If the higher layer configuration does not support an interleaved mode of VRB-to-PRB mapping, or the higher layer configuration only supports the Type 0 resource allocation type, DCI 1_1 is a bit for indicating non-interleaved VRB-to-PRB mapping and non VRB-to-PRB mapping. Otherwise, the VRB-to-PRB mapping bit indicates the non-interleaved or interleaved mode.
For Type 0 and Type 1 resource allocation methods, refer to the following uplink and downlink frequency domain resource allocation schemes in NR.

(2) Introduction to two resource allocation types: Type 0 and Type 1:

Type 0:

Resource blocks in a target uplink/downlink BWP for resource allocation are classified into a plurality of resource block groups (Resource Block Group, RBG), and each RBG corresponds to a set of a maximum of P consecutive VRBs, where P is a quantity of resource blocks included in the target uplink/downlink BWP based on a higher-level parameter configuration (indicating which column in Table 1 is used, that is, a configuration 1 (Configuration 1) or a configuration 2 (Configuration 2)). Table 1: Nominal RBG size P (Nominal RBG size P)

Carrier bandwidth part size (Carrier Bandwidth Part Size) Configuration 1 Configuration 2

1-36 2 4

37-72 4 8

73-144 8 16

145-275 16 16
A bitmap (Bitmap) is used by an FDRA field of DCI format (Format) 0_1/1_1 to indicate whether each RBG in the target uplink BWP is allocated for the terminal. Each bit in the bitmap is in a one-to-one correspondence with each RBG in the target uplink/downlink BWP. When a bit in the bitmap is set to 1, it indicates that the corresponding RBG is allocated for the terminal, that is, all resource blocks included in the RBG are allocated for the terminal.
DCI Format 0_0/1_0 does not support the uplink resource allocation type 0.

Type 1

Assuming that a starting VRB number in the VRB set is RB_start (a local number within the target uplink BWP) and a quantity of continuous allocated VRBs is L_RBs, a resource indication value (Resource Indication Value, RIV) is calculated based on the following formula: If $(L_{RBs} - 1) \leq ⌊ N_{BWP}^{size} / 2 ⌋, RIV = N_{BWP}^{size} (L_{RBs} - 1) + {RB}_{start} .$
Otherwise, $RIV = N_{BWP}^{size} (N_{BWP}^{size} - L_{RBs} + 1) + (N_{BWP}^{size} - 1 - {RB}_{start}) .$
$N_{BWP}^{size}$
is a quantity of VRBs included in the target uplink BWP, and L_RBs ≥ 1 and does not exceed $N_{BWP}^{size} - {RB}_{start} .$
An RIV is indicated in an "FDRA" field of DCI Format 0_0/0_1/1_0/1_1, to indicate an allocated VRB set to the terminal.
The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some rather than all of the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
The term "include" and any other variants in the specification and claims of this application mean to cover the non-exclusive inclusion, for example, a process, method, system, product, or device that includes a list of steps or units is not necessarily limited to those steps or units, but may include other steps or units not expressly listed or inherent to such a process, method, product, or device. In addition, in the specification and claims, "and/or" is used to indicate at least one of connected objects. For example, A and/or B represents the following three cases: Only A is included, only B is included, and both A and B exist.
In the embodiments of the present invention, the word such as "example" or "for example" is used to represent giving an example, an illustration, or a description. Any embodiment or design scheme described as an "example" in the embodiments of the present invention should not be explained as being more preferred or having more advantages than another embodiment or design scheme. Exactly, use of the term "example" or "for example" is intended to present a concept in a specific manner.
The technology described in this specification is not limited to a Long Term Evolution (Long Time Evolution, LTE)/LTE-Advanced (LTE-Advanced, LTE-A) system, and can also be used in various wireless communications systems such as Code Division Multiple Access (Code Division Multiple Access, CDMA), Time Division Multiple Access (Time Division Multiple Access, TDMA), Frequency Division Multiple Access (Frequency Division Multiple Access, FDMA), Orthogonal Frequency Division Multiple Access (Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency-Division Multiple Access (Single-carrier Frequency-Division Multiple Access, SC-FDMA), and another system.
The terms "system" and "network" are often used interchangeably. The CDMA system may implement wireless technologies such as CDMA2000 and universal terrestrial radio access (universal terrestrial radio access, UTRA). UTRA includes wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. The TDMA system can implement radio technologies such as global system for mobile communications (Global System for Mobile Communication, GSM). The OFDMA system can implement radio technologies such as ultra-mobile broadband (Ultra Mobile Broadband, UMB), evolved-UTRA (Evolution-UTRA, E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, and Flash-OFDM. UTRA and E-UTRA are parts of a universal mobile telecommunications system (Universal Mobile Telecommunications System, UMTS). LTE and more advanced LTE (for example, LTE-A) are new UMTS versions using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in the literature from an organization called 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP). CDMA2000 and UMB are described in the literature from an organization called "3rd Generation Partnership Project 2" (3GPP2). The technologies described herein can be used both in the systems and radio technologies mentioned above, and can also be used in other systems and radio technologies.
The embodiments of the present invention are described below with reference to the accompanying drawings. A frequency domain resource allocation method and a device provided in the embodiments of the present invention may be applied to a wireless communications system. Referring to FIG. 1, FIG. 1 is a schematic architectural diagram of a communications system according to an embodiment of the present invention. As shown in FIG. 1, the wireless communications system may include a network device 11 and a terminal 12. The terminal 12 may be denoted as UE 12, and the terminal 12 may communicate (transmit signaling or transmit data) with the network device 11. In actual application, a connection between the devices may be a wireless connection. For ease of visually indicating a connection relationship between the devices, solid lines are used for illustration in FIG. 1.
The network device 11 provided in the embodiments of the present invention may be a base station, and the base station may be a commonly used base station, or may be an evolved base station (evolved node base station, eNB), or may be a network device in a 5G system (for example, a next generation base station (next generation node base station, gNB) or a transmission and reception point (transmission and reception point, TRP)).
The terminal 12 provided in the embodiments of the present invention may be a mobile phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (Ultra-Mobile Personal Computer, UMPC), a netbook, a personal digital assistant (Personal Digital Assistant, PDA), a mobile internet device (Mobile Internet Device, MID), a wearable device (Wearable Device), an in-vehicle device, or the like.
Referring to FIG. 2, an embodiment of the present invention further provides a frequency domain resource allocation method. The method is performed by a terminal, and includes step 201 and step 202.
Step 201: Receive first downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts (or referred to as active BWPs).
Step 202: Obtain frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to the first downlink control information, a quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and a frequency domain resource group corresponding to each bit.
It should be noted that in the following example, a frequency domain resource is an RB, a frequency domain resource group is an RBG, and a frequency domain resource group size is an RBG size. However, this is not limited thereto.
For example, an RBG size is determined according to a total RB quantity of the plurality of carriers, cells, or BWPs scheduled by using the first DCI or according to an RB quantity of each carrier, cell, or BWP, and Type 0 frequency domain resource allocation of each carrier, cell, or BWP is indicated according to the RBG size, or Type 0 frequency domain resource allocation of the plurality of carriers, cells, or BWPs is jointly indicated.
In some implementations, before step 202, the method shown in FIG. 2 may further include: determining a frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts; and obtaining, according to the frequency domain resource group size, the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part and/or the frequency domain resource group corresponding to each bit.
Further, the frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts is configured by a network side; or the frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts are obtained according to a correspondence between a frequency domain resource quantity and a frequency domain resource group size and a first quantity, where
the first quantity includes one or more of the following:

(1) a total frequency domain resource quantity of the plurality of carriers, where the total frequency domain resource quantity of the plurality of carriers is a sum of frequency domain resource quantities of the carriers;
(2) a total frequency domain resource quantity of the plurality of cells, where
the total frequency domain resource quantity of the plurality of cells is a sum of frequency domain resource quantities of the cells;
(3) a total frequency domain resource quantity of the plurality of bandwidth parts, where
the total frequency domain resource quantity of the plurality of bandwidth parts is a sum of frequency domain resource quantities of the bandwidth parts;
(4) a maximum frequency domain resource quantity or a minimum frequency domain resource quantity of at least a part of carriers in the plurality of carriers;
(5) a maximum frequency domain resource quantity or a minimum frequency domain resource quantity of at least a part of cells in the plurality of cells; and
(6) a maximum frequency domain resource quantity or a minimum frequency domain resource quantity of at least a part of bandwidth parts in the plurality of bandwidth parts.

With reference to solution 1 to solution 3, the following describes how the terminal reduces overheads of Type 0 frequency domain resource allocation in a scenario in which a plurality of carriers, cells, or BWPs are scheduled by using one piece of DCI.
Solution 1: An RBG size P (a quantity of included RBs) is determined according to a total RB quantity of the plurality of carriers, cells, or active BWPs scheduled by using the first DCI or a maximum/minimum RB quantity in N carriers, cells, or active BWPs, and a correspondence between an RB quantity and an RBG size (it should be noted that, the correspondence is different from a correspondence with scheduling of a single carrier, for example, a new RB size range (range) or a new RBG size is introduced) and is used as a granularity (that is, an RB quantity represented by 1 bit in a bitmap) for indication of frequency domain resource allocation of each carrier, cell, or active BWP, and the quantity of bits required for frequency domain resource allocation of each carrier, cell, or active BWP and/or the frequency domain resource group corresponding to each bit are/is calculated.
In this case, a size of a frequency domain resource allocation indication field is ΣNi, where Ni is a size of a frequency domain resource allocation bitmap determined based on an RBG size P of the i-th carrier, cell, or active BWP, and i is a natural number.
It can be understood that the RBG size P may be configured by the network side, for example, configured by using radio resource control (Radio Resource Control, RRC).
Solution 2: An RBG size of each carrier, cell, or active BWP is determined according to an RB quantity of each carrier, cell, or active BWP scheduled by using the first DCI, and the determined RBG size is scaled (scaling) according to a predefined or RRC-configured scaling coefficient or according to a quantity of carriers, cells, or active BWPs scheduled by using the first DCI and is used as a granularity (that is, an RB quantity represented by 1 bit in a bitmap) for indication of frequency domain resource allocation of each carrier, cell, or active BWP, and the quantity of bits required for frequency domain resource allocation of each carrier, cell, or active BWP and/or the frequency domain resource group corresponding to each bit are/is calculated.
In this case, a size of a frequency domain resource allocation indication field is ΣNi, where Ni is a size of a frequency domain resource allocation bitmap determined based on an RBG size P of the i-th carrier, cell, or active BWP, and i is a natural number.
In some implementations of the solution 2, before step 202, the method shown in FIG. 2 may further include:
obtaining a frequency domain resource group size of each scheduled carrier, cell, or bandwidth part according to a frequency domain resource quantity of each scheduled carrier, cell, or bandwidth part; performing scaling processing (scaling) on the frequency domain resource group size of each scheduled carrier, cell, or bandwidth part; and obtaining, according to a scaled frequency domain resource group size of each scheduled carrier, cell, or bandwidth part, the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part and/or the frequency domain resource group corresponding to each bit.
Solution 3: The RBG size is determined according to the total RB quantity of the plurality of carriers, cells, or active BWPs scheduled by using the first DCI or a maximum or minimum RB quantity in N (N is greater than or equal to 1) carriers, and a correspondence between an RB quantity and an RBG size (it should be noted that, the correspondence is different from a correspondence with scheduling of a single carrier, for example, a new RB size range or a new RBG size is introduced), and then Type 0 frequency domain resource allocation of the plurality of carriers, cells, or BWPs is jointly indicated according to the RBG size, for example, it is indicated that continuous fragmented (fragmented) RBGs on two BWPs share 1 bit.
It can be understood that the RBG size may be configured by the network side, for example, configured by using RRC.
In some implementations, Type 0 frequency domain resources allocated for the terminal on the plurality of carriers, cells, or bandwidth parts include any one of the following:

(1) Type 0 frequency domain resources jointly allocated for the terminal on the plurality of carriers;
(2) Type 0 frequency domain resources jointly allocated for the terminal on the plurality of cells;
(3) Type 0 frequency domain resources jointly allocated for the terminal on the plurality of bandwidth parts;
(4) Type 0 frequency domain resources allocated for the terminal on each of the plurality of carriers;
(5) Type 0 frequency domain resources allocated for the terminal on each of the plurality of cells; and
(6) Type 0 frequency domain resources allocated for the terminal on each of the plurality of bandwidth parts.

In this embodiment of the present invention, in a scenario in which a plurality of carriers, cells, or BWPs are scheduled by using one piece of DCI, resource overheads of a control channel can be reduced while same scheduling flexibility is maintained, thereby improving demodulation performance of the control channel and effective coverage of a system.
Referring to FIG. 3, an embodiment of the present invention further provides a frequency domain resource allocation method. The method may be performed by a network device, and specifically includes step 301.
Step 301: Send first downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts.
The first downlink control information is used to instruct a terminal to obtain frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to the first downlink control information, a quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and a frequency domain resource group corresponding to each bit.
In some implementations, before step 301, the method shown in FIG. 3 may further include:
determining the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and the frequency domain resource group corresponding to each bit.
In some implementations, before step 301, the method shown in FIG. 3 may further include: determining a frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts; and obtaining, according to the frequency domain resource group size, the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part and/or the frequency domain resource group corresponding to each bit.
For example, the network device configures frequency domain resource size of the plurality of carriers, cells, or bandwidth parts by using RRC, and the network device determines, according to the frequency domain resource size, the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and the frequency domain resource group corresponding to each bit.
Alternatively, the network device obtains the frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts according to a first quantity and a correspondence between a frequency domain resource quantity and a frequency domain resource group size, where
the first quantity includes one or more of the following:

With reference to solution 1 to solution 3, the following describes how the network device reduces overheads of Type 0 frequency domain resource allocation in a scenario in which a plurality of carriers, cells, or BWPs are scheduled by using one piece of DCI.
Solution 1: An RBG size P (a quantity of included RBs) is determined according to a total RB quantity of the plurality of carriers, cells, or active BWPs scheduled by using the first DCI or a maximum/minimum RB quantity in N carriers, cells, or active BWPs, and a correspondence between an RB quantity and an RBG size (it should be noted that, the correspondence is different from a correspondence with scheduling of a single carrier, for example, a new RB size range or a new RBG size is introduced) and is used as a granularity (that is, an RB quantity represented by 1 bit in a bitmap) for indication of frequency domain resource allocation of each carrier, cell, or active BWP, and the quantity of bits required for frequency domain resource allocation of each carrier, cell, or active BWP and/or the frequency domain resource group corresponding to each bit are/is calculated.
In this case, a size of a frequency domain resource allocation indication field is ΣNi, where Ni is a size of a frequency domain resource allocation bitmap determined based on an RBG size P of the i-th carrier, cell, or active BWP, and i is a natural number.
It can be understood that the RBG size P may be configured by the network side, for example, configured by using radio resource control (Radio Resource Control, RRC).
Solution 2: An RBG size of each carrier, cell, or active BWP is determined according to an RB quantity of each carrier, cell, or active BWP scheduled by using the first DCI, and the determined RBG size is scaled (scaling) according to a predefined or RRC-configured scaling coefficient or according to a quantity of carriers, cells, or active BWPs scheduled by using the first DCI and is used as a granularity (that is, an RB quantity represented by 1 bit in a bitmap) for indication of frequency domain resource allocation of each carrier or active BWP, and the quantity of bits required for frequency domain resource allocation of each carrier, cell, or active BWP and/or the frequency domain resource group corresponding to each bit are/is calculated.
In this case, a size of a frequency domain resource allocation indication field is ΣNi, where Ni is a size of a frequency domain resource allocation bitmap determined based on an RBG size P of the i-th carrier, cell, or active BWP, and i is a natural number.
In some implementations of the solution 2, before step 301, the method shown in FIG. 3 may further include:
obtaining a frequency domain resource group size of a carrier, cell, or bandwidth part according to a frequency domain resource quantity of the carrier, cell, or bandwidth part; performing scaling processing (scaling) on the frequency domain resource group size of the carrier, cell, or bandwidth part; and obtaining, according to a scaled frequency domain resource group size of the carrier, cell, or bandwidth part, the quantity of bits required for frequency domain resource allocation of the carrier, cell, or bandwidth part and/or the frequency domain resource group corresponding to each bit.
Solution 3: The RBG size is determined according to the total RB quantity of the plurality of carriers, cells, or active BWPs scheduled by using the first DCI or a maximum or minimum RB quantity in N (N is greater than or equal to 1) carriers, and a correspondence between an RB quantity and an RBG size (it should be noted that, the correspondence is different from a correspondence with scheduling of a single carrier, for example, a new RB size range or a new RBG size is introduced), and then Type 0 frequency domain resource allocation of the plurality of carriers, cells, or BWPs is jointly indicated according to the RBG size, for example, it is indicated that continuous fragmented (fragmented) RBGs on two BWPs share 1 bit.
It can be understood that the RBG size may be configured by the network side, for example, configured by using RRC.
In some implementations, the first downlink control information is used to indicate any one of the following:

Type 0 frequency domain resources jointly allocated for the terminal on the plurality of carriers;
Type 0 frequency domain resources jointly allocated for the terminal on the plurality of cells;
Type 0 frequency domain resources jointly allocated for the terminal on the plurality of bandwidth parts;
Type 0 frequency domain resources allocated for the terminal on each of the plurality of carriers;
Type 0 frequency domain resources allocated for the terminal on each of the plurality of cells; and
Type 0 frequency domain resources allocated for the terminal on each of the plurality of bandwidth parts.

In this embodiment of the present invention, in a scenario in which a plurality of carriers, cells, or BWPs are scheduled by using one piece of DCI, resource overheads of a control channel can be reduced while same scheduling flexibility is maintained, thereby improving demodulation performance of the control channel and effective coverage of a system.
Referring to FIG. 4, an embodiment of the present invention further provides a frequency domain resource allocation method. The method is performed by a terminal, and specifically includes step 401 and step 402.
Step 401: Receive second downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts.
Step 402: Obtain frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to a frequency domain resource allocation field in the second downlink control information.
The frequency domain resource allocation field includes an index corresponding to a frequency domain resource allocation bitmap or an index of a frequency domain resource set, and the frequency domain resource set meets a preset condition.
Solution a: The frequency domain resource allocation field includes an index corresponding to a frequency domain resource allocation bitmap.
In some implementations of the solution a, the method includes:
receiving a resource indication value list configured by a network device for each scheduled carrier, cell, or bandwidth part, where the index represents a location of the frequency domain resource allocation bitmap in the resource indication value list. It can be understood that the index may be implicitly included, one RIV list is configured, and the location of the frequency domain resource allocation bitmap in the RIV list is the index.
In some implementations of the solution a, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the resource indication value list configured for each scheduled carrier, cell, or bandwidth part.
In some implementations of the solution a, the method includes:
receiving a resource indication value list jointly configured by a network device for the plurality of carriers, cells, or bandwidth parts, where the index represents a location of the frequency domain resource allocation bitmap in the jointly configured resource indication value list.
In some implementations of the solution a, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the jointly configured resource indication value list.
In some implementations of the solution a, the frequency domain resource allocation bitmap indicates frequency domain resources allocated for the terminal on one scheduled carrier, cell, or bandwidth part, or indicates frequency domain resources jointly allocated for the terminal on the plurality of carriers, cells, or bandwidth parts.
That is, in the solution a, RRC configures an RIV list corresponding to a required bitmap code point, and DCI performs frequency domain resource indication by using an index corresponding to the bitmap code point.

(1) If an RIV list is separately configured for one or more scheduled carriers, cells, or BWPs through RRC, a size of an FDRA field required for scheduling each carrier, cell, or BWP is calculated according to a quantity of bitmap code points in each configured RIV list.
(2) If an RIV list is jointly configured for a plurality of scheduled carriers, cells, or BWPs through RRC, a size of an FDRA field required for scheduling the plurality of carriers, cells, or BWPs is calculated according to a quantity of bitmap code points in the jointly configured RIV list.

Solution b: The frequency domain resource allocation field includes an index of a frequency domain resource set, where the frequency domain set meets a preset condition.
In some implementations of the solution b, the preset condition includes one or more of the following:

(1) a quantity of frequency domain resources in the frequency domain resource set being greater than or equal to a first preset value, where for example, the first preset value may be predefined or configured through RRC;
(2) a ratio of the quantity of frequency domain resources in the frequency domain resource set to a quantity of allocable frequency domain resources on a carrier, cell, or bandwidth part being greater than or equal to a second preset value, where for example, the second preset value may be predefined or configured through RRC, for example, 50%; and
(3) frequency domain resources in the frequency domain resource set being discontinuous frequency domain resources.

In some implementations of the solution b, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource sets, that is, a quantity of bits a frequency domain resource allocation field required by the carrier, the cell, or the BWP is calculated according to a quantity of RB sets that meet the preset condition.
In some implementations of the solution b, the index indicates that the frequency domain resource set is arranged in ascending order or descending order according to a length of a corresponding bitmap.
That is, in the solution b, the size of the frequency domain resource allocation field is determined by using a quantity of frequency domain resource allocation bitmaps that meet the preset condition, and the frequency domain resource allocation bitmap that meets the preset condition is numbered to obtain an index of the bitmap. An index in DCI received by the terminal corresponds to a corresponding frequency domain resource allocation bitmap, to obtain allocated frequency domain resources on the plurality of carriers, cells, or bandwidth parts. That is, a mapping relationship among an index -> a bitmap -> a frequency domain resource is specified in a protocol, and both the terminal and the network use the mapping relationship to receive DCI to obtain the allocated frequency domain resources on the plurality of carriers, cells, or bandwidth parts, or send DCI to schedule the frequency domain resources on the plurality of corresponding carriers, cells, or bandwidth parts.
In this embodiment of the present invention, candidates of frequency domain resource allocation are properly restricted. In this way, in a scenario in which a plurality of carriers, cells, or BWPs are scheduled by using one piece of DCI, resource overheads of a control channel can be reduced while same scheduling flexibility is maintained, thereby improving demodulation performance of the control channel and effective coverage of a system.
Referring to FIG. 5, an embodiment of the present invention further provides a frequency domain resource allocation method. The method is performed by a network device, and specifically includes step 501.
Step 501: Send second downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts.
A frequency domain resource allocation field in the second downlink control information includes an index of a frequency domain resource allocation bitmap or an index of a frequency domain resource set, and the frequency domain resource set meets a preset condition.
Solution a: The frequency domain resource allocation field includes an index of a frequency domain resource allocation bitmap.
In some implementations of the solution a, the method further includes: receiving a resource indication value list configured for each scheduled carrier, cell, or bandwidth part, where the index represents a location of the frequency domain resource allocation bitmap in the resource indication value list.
In some implementations of the solution a, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the resource indication value list configured for each carrier, cell, or bandwidth part.
In some implementations of the solution a, the method further includes: receiving a resource indication value list jointly configured for the plurality of carriers, cells, or bandwidth parts, where the index represents a location of the frequency domain resource allocation bitmap in the jointly configured resource indication value list.
In some other implementations of the solution a, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the jointly configured resource indication value list.
In some implementations of the solution a, the frequency domain resource allocation bitmap indicates a frequency domain resource allocated for the terminal on one carrier, cell, or bandwidth part, or indicates frequency domain resources jointly allocated for the terminal on the plurality of carriers, cells, or bandwidth parts.
That is, in the solution a, RRC configures an RIV list corresponding to a required bitmap code point, and DCI performs frequency domain resource indication by using an index corresponding to the bitmap code point.

(1) If an RIV list is separately configured for one or more scheduled carriers, cells, or BWPs through RRC, a size of an FDRA field required for scheduling each carrier, cell, or BWP is calculated according to a quantity of code points in each configured RIV list.
(2) If an RIV list is jointly configured for a plurality of scheduled carriers, cells, or BWPs through RRC, a size of an FDRA field required for scheduling the plurality of carriers, cells, or BWPs is calculated according to a quantity of bitmap code points in the jointly configured RIV list.

In some implementations of the solution b, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource sets, that is, a quantity of bits a frequency domain resource allocation field required by the carrier, the cell, or the BWP is calculated according to a quantity of RB sets that meet the preset condition.
In some implementations of the solution b, the index indicates that the frequency domain resource set is arranged in ascending order or descending order according to a length of a corresponding bitmap.
In this embodiment of the present invention, candidates of frequency domain resource allocation are properly restricted. In this way, in a scenario in which a plurality of carriers, cells, or BWPs are scheduled by using one piece of DCI, resource overheads of a control channel can be reduced while same scheduling flexibility is maintained, thereby improving demodulation performance of the control channel and effective coverage of a system.
The following describes implementations of the present invention with reference to Embodiment 1, Embodiment 2, and Embodiment 3.

Embodiment 1

When I carriers, cells, or BWPs (I>1) are scheduled by using DCI, an RB quantity of the i-th carrier or BWP is Ni, and a total RB quantity of the I scheduled carriers, cells, or BWPs is calculated as ∑Ni. In this case, an RBG size for scheduling the i-th carrier, cell, or BWP is the same. The RBG size is determined according to the calculated value ∑Ni and an RRC configuration based on Table 2.
It should be noted that, different from a configuration table for scheduling a single carrier, Table 2 may be a predefined new table in a protocol. For example, a new BWP size, a new RBG size, or a different RB range (range) is configured in the new table.
An RBG corresponding to each bit and a required bit quantity are obtained on the i-th carrier, cell, or BWP according to the determined RBG size, and are separately indicated in the DCI. Table 2: RBG size

Carrier Bandwidth Part Size Configuration 1 Configuration 2

1-72 2 4

72-144 4 8

145-275 8 16

276-550 16 16
Optionally, the RBG size may be explicitly configured by using RRC.

Embodiment 2

When I carriers, cells, or BWPs (I>1) are scheduled by using DCI, an RB quantity of the i-th carrier, cell, or BWP is Ni. An RBG size is determined according to Ni and an configuration RRC configuration based on Table 2 to obtain RBGi, and RBGi is scaled according to a predefined scaling coefficient or a scaling coefficient configuration through RRC, for example, the scaling coefficient is K to obtain a new RBG size of the i-th carrier, cell, or BWP: RBG'i=K^∗RBGi. An RBG corresponding to each bit and a required bit quantity are obtained on the i-th carrier, cell, or BWP according to RBG'i, and are separately indicated in the DCI.

Embodiment 3

RRC configures a table corresponding to a required bitmap code point (frequency domain resource allocation bitmap), and DCI performs frequency domain resource indication by using an index corresponding to the bitmap code point. For example, if an RB quantity of one BWP is 20, and an RBG size is 2, 10 bits are required to indicate Type 0 frequency domain resource allocation, and if RRC configures a correspondence between a bitmap code point and an index, 2 bits are used in the DCI to indicate a value of the FDRA. Table 3: Correspondence between a bitmap code point and an index (Index)

Index Type 0 FDRA

0 1010101010

1 0101010101

2 1101001001

3 1001001011

Embodiment 4

It is stipulated that a frequency domain RB for scheduling needs to be greater than half of a total RB quantity of a BWP. Type 0 FDRA values that meet this condition are sorted, and are indicated by sorted indexes. For example, if an RB quantity of one BWP is 10, and an RBG size is 2, Type 0 FDRA that meets the condition is 00111, 01101, 01110, 01111, 10011, 10101, 10110, 10111, 11001, 11010, 11011, 11100, 11101, 11110, and 11111, which need to be indicated by 4 bits. For example, FDRA represented by 0000 is 00111.
Referring to FIG. 6, an embodiment of the present invention further provides a terminal, and the terminal 600 includes:

a first receiving module 601, configured to receive first downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts; and
a first processing module 602, configured to obtain frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to the first downlink control information, a quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and a frequency domain resource group corresponding to each bit.

In some implementations, the terminal 600 further includes:

a second processing module, configured to determine a frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts; and
a third processing module, configured to obtain, according to the frequency domain resource group size, the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part and/or the frequency domain resource group corresponding to each bit.

Optionally, the frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts is configured by a network side.
Optionally, the second processing module is further configured to obtain the frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts according to a correspondence between a frequency domain resource quantity and a frequency domain resource group size and a first quantity, where
the first quantity includes any one of the following:

In some implementations, the terminal 600 further includes:

In some implementations, the fifth processing module is further configured to perform scaling processing on the frequency domain resource group size of each scheduled carrier, cell, or bandwidth part according to a scaling coefficient, where
the scaling coefficient is agreed in a protocol, or the scaling coefficient is configured by a network side, or the scaling coefficient is obtained according to a quantity of carriers, cells, or bandwidth parts scheduled by using the first downlink control information.
In some implementations, a size of a frequency domain resource allocation indication field of the first downlink control information is ΣNi, where Ni is a frequency domain resource allocation bitmap size determined based on a frequency domain resource group size of the i-th scheduled carrier, cell, or bandwidth part, and i is a natural number.
In some implementations, the frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts include any one of the following:

The terminal provided in this embodiment of the present invention may perform the foregoing method embodiment shown in FIG. 2. An implementation principle and a technical effect of the terminal are similar to those of the method embodiment, and details are not described herein again in this embodiment.
Referring to FIG. 7, an embodiment of the present invention further provides a network device, and the network device 700 includes:

a first sending module 701, configured to send first downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts, where
the first downlink control information is used to instruct a terminal to obtain frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to the first downlink control information, a quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and a frequency domain resource group corresponding to each bit.

In some implementations, the network device 700 further includes:
a determining module, configured to determine the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and the frequency domain resource group corresponding to each bit.
In some implementations, the network device 700 further includes:

In some implementations, the network device 700 further includes:

In some implementations, the eleventh processing module is further configured to perform scaling processing on the frequency domain resource group size of each scheduled carrier, cell, or bandwidth part according to a scaling coefficient, where
the scaling coefficient is agreed in a protocol, or the scaling coefficient is configured by a network side, or the scaling coefficient is obtained according to a quantity of carriers, cells, or bandwidth parts scheduled by using the first downlink control information.
In some implementations, a size of a frequency domain resource allocation indication field of the first downlink control information is ∑Ni, where Ni is a frequency domain resource allocation bitmap size determined based on a frequency domain resource group size of the i-th scheduled carrier, cell, or bandwidth part, and i is a natural number.
The network device provided in this embodiment of the present invention may perform the foregoing method embodiment shown in FIG. 3. An implementation principle and a technical effect of the network device are similar to those of the method embodiment, and details are not described herein again in this embodiment.
Referring to FIG. 8, an embodiment of the present invention further provides a terminal, and the terminal 800 includes:

a second receiving module 801, configured to receive second downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts; and
a thirteenth processing module 802, configured to obtain frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to a frequency domain resource allocation field in the second downlink control information, where
the frequency domain resource allocation field includes an index corresponding to a frequency domain resource allocation bitmap or an index corresponding to a frequency domain resource set, and the frequency domain resource set meets a preset condition.

In some implementations, the terminal 800 further includes:
a third receiving module, configured to: receive a resource indication value list configured by a network device for each scheduled carrier, cell, or bandwidth part, where the index represents a location of the frequency domain resource allocation bitmap in the resource indication value list; or receive a resource indication value list jointly configured by a network device for the plurality of carriers, cells, or bandwidth parts, where the index represents a location of the frequency domain resource allocation bitmap in the jointly configured resource indication value list.
In some implementations, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the resource indication value list configured for each carrier, cell, or bandwidth part; or a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the jointly configured resource indication value list.
In some implementations, the frequency domain resource allocation bitmap indicates a frequency domain resource allocated for the terminal on one carrier, cell, or bandwidth part, or indicates frequency domain resources jointly allocated for the terminal on the plurality of carriers, cells, or bandwidth parts.
In some implementations, the preset condition includes one or more of the following:

In some implementations, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource sets.
In some implementations, the index of the frequency domain resource set indicates that the frequency domain resource set is arranged in ascending order or descending order according to a length of a corresponding bitmap.
The terminal provided in this embodiment of the present invention may perform the foregoing method embodiment shown in FIG. 4. An implementation principle and a technical effect of the terminal are similar to those of the method embodiment, and details are not described herein again in this embodiment.
Referring to FIG. 9, an embodiment of the present invention further provides a network device, and the network device 900 includes:

a second sending module 901, configured to send second downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts, where
a frequency domain resource allocation field in the second downlink control information includes an index of a frequency domain resource allocation bitmap or an index of a frequency domain resource set, and the frequency domain resource set meets a preset condition.

In some implementations, the network device 900 further includes:
a third sending module, configured to: send a resource indication value list configured for each scheduled carrier, cell, or bandwidth part, where the index represents a location of the frequency domain resource allocation bitmap in the resource indication value list; or send a resource indication value list jointly configured for the plurality of carriers, cells, or bandwidth parts, where the index represents a location of the frequency domain resource allocation bitmap in the jointly configured resource indication value list.
In some implementations, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the resource indication value list configured for each carrier, cell, or bandwidth part; or a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the jointly configured resource indication value list.
In some implementations, the preset condition includes one or more of the following:

In some implementations, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource sets.
In some implementations, the index of the frequency domain resource set indicates that the frequency domain resource set is arranged in ascending order or descending order according to a length of a corresponding bitmap.
The network device provided in this embodiment of the present invention may perform the foregoing method embodiment shown in FIG. 5. An implementation principle and a technical effect of the network device are similar to those of the method embodiment, and details are not described herein again in this embodiment.
Referring to FIG. 10, FIG. 10 is a structural diagram of a communications device to which the embodiments of the present invention are applied. As shown in FIG. 10, the communications device 1000 includes a processor 1001, a transceiver 1002, a memory 1003, and a bus interface.
In an embodiment of the present invention, the communications device 1000 further includes a computer program stored in the memory 1003 and executable on the processor 1001, and when the computer program is executed by the processor 1001, the steps in the embodiment shown in FIG. 2, FIG. 3, FIG. 4, or FIG. 5 are implemented.
In FIG. 10, a bus architecture may include any quantity of interconnected buses and bridges. Specifically, various circuits of one or more processors represented by the processor 1001 and a memory represented by the memory 1003 are interconnected. The bus architecture may further link various other circuits such as a peripheral device, a voltage regulator, and a power management circuit. These are well known in the art, and therefore are not further described in this specification. A bus interface provides an interface. The transceiver 1002 may be a plurality of components. To be specific, the transceiver 1002 includes a transmitter and a receiver, and provides a unit configured to communicate with various other apparatuses on a transmission medium. It can be understood that the transceiver 1002 is an optional component.
The processor 1001 is responsible for bus architecture management and general processing. The memory 1003 may store data used by the processor 1001 when the processor 1001 performs an operation.
The communications device provided in this embodiment of the present invention may perform the foregoing method embodiment shown in FIG. 2, FIG. 3, FIG. 4, or FIG. 5. An implementation principle and a technical effect of the communications device are similar to those of the method embodiments, and details are not described herein again in this embodiment.
An embodiment of the present invention further provides a chip, where the chip includes a processor and a communications interface, the communications interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement the processes of the method embodiment shown in FIG. 2, FIG. 3, FIG. 4, or FIG. 5, and a same technical effect can be achieved. To avoid repetition, details are not described herein again.
It should be understood that the chip mentioned in this embodiment of the present invention may also be referred to as a system-level chip, a system chip, a chip system, or an on-chip system chip.
Method or algorithm steps described in combination with the content disclosed in the present invention may be implemented by hardware, or may be implemented by a processor by executing a software instruction. The software instruction may include a corresponding software module. The software module may be stored in a random access memory (Random Access Memory, RAM), a flash memory, a read-only memory (Read-Only Memory, ROM), an erasable programmable read only memory (Erasable PROM, EPROM), an electrically erasable programmable read only memory (Electrically EPROM, EEPROM), a register, a hard disk, a removable hard disk, a compact disc read only memory, or any other form of storage medium well-known in the art. For example, a storage medium is coupled to the processor, so that the processor can read information from the storage medium or write information into the storage medium. Certainly, the storage medium may be a component of the processor. The processor and the storage medium may be located in an application specific integrated circuit (Application Specific Integrated Circuit, ASIC). In addition, the ASIC may be located in a core network interface device. Certainly, the processor and the storage medium may exist in the core network interface device as discrete components.
A person skilled in the art should be aware that in the foregoing one or more examples, functions described in the present invention may be implemented by hardware, software, firmware, or any combination thereof. When implemented by software, the foregoing functions may be stored in a computer-readable medium or transmitted as one or more instructions or code in the computer-readable medium. The computer-readable medium includes a computer storage medium and a communications medium, where the communications medium includes any medium that enables a computer program to be transmitted from one place to another. The storage medium may be any available medium accessible to a general-purpose or dedicated computer.
The objectives, technical solutions, and benefits of the present invention are further described in detail in the foregoing specific embodiments. It should be understood that the foregoing descriptions are merely specific embodiments of the present invention, but are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, or the like based on the technical solutions of the present invention shall fall within the protection scope of the present invention.
A person skilled in the art should understand that the embodiments of the present invention may be provided as a method, a system, or a computer program product. Therefore, the embodiments of the present invention may use a form of hardware only embodiments, software only embodiments, or embodiments with a combination of software and hardware. Moreover, the embodiments of the present invention may use a form of a computer program product that is implemented on one or more computer-usable storage media (including but not limited to a magnetic disk memory, a CD-ROM, an optical memory, and the like) that include computer-usable program code.
The embodiments of the present invention are described with reference to the flowcharts and/or block diagrams of the method, the device (system), and the computer program product according to the embodiments of the present invention. It should be understood that computer program instructions may be used to implement each process and/or each block in the flowcharts and/or the block diagrams and a combination of a process and/or a block in the flowcharts and/or the block diagrams. These computer program instructions may be provided for a general-purpose computer, a dedicated computer, an embedded processor, or a processor of any other programmable data processing device to generate a machine, so that the instructions executed by a computer or a processor of any other programmable data processing device generate an apparatus for implementing a specific function in one or more processes in the flowcharts and/or in one or more blocks in the block diagrams.
These computer program instructions may also be stored in a computer readable memory that can instruct the computer or any other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory generate an artifact that includes an instruction apparatus. The instruction apparatus implements a specific function in one or more processes in the flowcharts and/or in one or more blocks in the block diagrams.
These computer program instructions may also be loaded onto a computer or another programmable data processing device, so that a series of operations and steps are performed on the computer or the another programmable device, thereby generating computer-implemented processing. Therefore, the instructions executed on the computer or the another programmable device provide steps for implementing a specific function in one or more processes in the flowcharts and/or in one or more blocks in the block diagrams.
Apparently, persons skilled in the art can make various modifications and variations to embodiments of the present invention without departing from the spirit and scope of the present invention. In this way, the present invention is intended to cover these modifications and variations provided that they fall within the scope of protection defined by the following claims and their equivalent technologies.

Claims

A frequency domain resource allocation method, applied to a terminal and comprising:
receiving first downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts; and

obtaining frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to the first downlink control information, a quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and a frequency domain resource group corresponding to each bit.
The method according to claim 1, wherein the method further comprises:
determining a frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts; and

obtaining, according to the frequency domain resource group size, the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part and/or the frequency domain resource group corresponding to each bit.
The method according to claim 2, wherein the frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts is configured by a network side.
The method according to claim 2, wherein the determining a frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts comprises:
obtaining the frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts according to a correspondence between a frequency domain resource quantity and a frequency domain resource group size and a first quantity, wherein

the first quantity comprises any one of following:
a total frequency domain resource quantity of the plurality of carriers;

a total frequency domain resource quantity of the plurality of cells;

a total frequency domain resource quantity of the plurality of bandwidth parts;

a maximum frequency domain resource quantity or a minimum frequency domain resource quantity of at least a part of carriers in the plurality of carriers;

a maximum frequency domain resource quantity or a minimum frequency domain resource quantity of at least a part of cells in the plurality of cells; and

a maximum frequency domain resource quantity or a minimum frequency domain resource quantity of at least a part of bandwidth parts in the plurality of bandwidth parts.
The method according to claim 1, wherein the method further comprises:
obtaining a frequency domain resource group size of each scheduled carrier, cell, or bandwidth part according to a frequency domain resource quantity of each scheduled carrier, cell, or bandwidth part;

performing scaling processing on the frequency domain resource group size of each scheduled carrier, cell, or bandwidth part; and

obtaining, according to a scaled frequency domain resource group size of each scheduled carrier, cell, or bandwidth part, the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part and/or the frequency domain resource group corresponding to each bit.
The method according to claim 5, wherein the performing scaling processing on the frequency domain resource group size of each scheduled carrier, cell, or bandwidth part comprises:
performing scaling processing on the frequency domain resource group size of each scheduled carrier, cell, or bandwidth part according to a scaling coefficient, wherein

the scaling coefficient is agreed in a protocol, or the scaling coefficient is configured by a network side, or the scaling coefficient is obtained according to a quantity of carriers, cells, or bandwidth parts scheduled by using the first downlink control information.
The method according to claim 1, wherein a size of a frequency domain resource allocation indication field of the first downlink control information is ∑Ni, wherein Ni is a frequency domain resource allocation bitmap size determined based on a frequency domain resource group size of an i-th scheduled carrier, cell, or bandwidth part, and i is a natural number.
The method according to claim 1, wherein the frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts comprise any one of following:
frequency domain resources jointly allocated for the terminal on the plurality of carriers;

frequency domain resources jointly allocated for the terminal on the plurality of cells;

frequency domain resources jointly allocated for the terminal on the plurality of bandwidth parts;

frequency domain resources allocated for the terminal on each of the plurality of carriers;

frequency domain resources allocated for the terminal on each of the plurality of cells; and

frequency domain resources allocated for the terminal on each of the plurality of bandwidth parts.
A frequency domain resource allocation method, applied to a network device and comprising:
sending first downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts, wherein

the first downlink control information is used to instruct a terminal to obtain frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to the first downlink control information, a quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and a frequency domain resource group corresponding to each bit.
The method according to claim 9, wherein the method further comprises:
determining the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and the frequency domain resource group corresponding to each bit.
The method according to claim 9, wherein the method further comprises:
determining a frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts; and

obtaining, according to the frequency domain resource group size, the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part and/or the frequency domain resource group corresponding to each bit.
The method according to claim 11, wherein the determining a frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts comprises:
obtaining the frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts according to a correspondence between a frequency domain resource quantity and a frequency domain resource group size and a first quantity, wherein

the first quantity comprises any one of following:
a total frequency domain resource quantity of the plurality of carriers;

a total frequency domain resource quantity of the plurality of cells;

a total frequency domain resource quantity of the plurality of bandwidth parts;

a maximum frequency domain resource quantity or a minimum frequency domain resource quantity of at least a part of carriers in the plurality of carriers;

a maximum frequency domain resource quantity or a minimum frequency domain resource quantity of at least a part of cells in the plurality of cells; and

a maximum frequency domain resource quantity or a minimum frequency domain resource quantity of at least a part of bandwidth parts in the plurality of bandwidth parts.
The method according to claim 9, wherein the method further comprises:
obtaining a frequency domain resource group size of each scheduled carrier, cell, or bandwidth part according to a frequency domain resource quantity of each scheduled carrier, cell, or bandwidth part;

performing scaling processing on the frequency domain resource group size of each scheduled carrier, cell, or bandwidth part; and

obtaining, according to a scaled frequency domain resource group size of the carrier, cell, or bandwidth part, the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part and/or the frequency domain resource group corresponding to each bit.
The method according to claim 13, wherein the performing scaling processing on the frequency domain resource group size of each scheduled carrier, cell, or bandwidth part comprises:
performing scaling processing on the frequency domain resource group size of each scheduled carrier, cell, or bandwidth part according to a scaling coefficient, wherein

the scaling coefficient is agreed in a protocol, or the scaling coefficient is configured by a network side, or the scaling coefficient is obtained according to a quantity of carriers, cells, or bandwidth parts scheduled by using the first downlink control information.
The method according to claim 9, wherein a size of a frequency domain resource allocation indication field of the first downlink control information is ∑Ni, wherein Ni is a frequency domain resource allocation bitmap size determined based on a frequency domain resource group size of an i-th scheduled carrier, cell, or bandwidth part, and i is a natural number.
A frequency domain resource allocation method, applied to a terminal and comprising:
receiving second downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts; and

obtaining frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to a frequency domain resource allocation field in the second downlink control information, wherein

the frequency domain resource allocation field comprises an index corresponding to a frequency domain resource allocation bitmap or an index corresponding to a frequency domain resource set, and the frequency domain resource set meets a preset condition.
The method according to claim 16, wherein the method further comprises:
receiving a resource indication value list configured by a network device for each scheduled carrier, cell, or bandwidth part, wherein the index represents a location of the frequency domain resource allocation bitmap in the resource indication value list.
The method according to claim 17, wherein a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the resource indication value list configured for each scheduled carrier, cell, or bandwidth part.
The method according to claim 16, wherein the method further comprises:
receiving a resource indication value list jointly configured by a network device for the plurality of carriers, cells, or bandwidth parts, wherein the index represents a location of the frequency domain resource allocation bitmap in the jointly configured resource indication value list.
The method according to claim 19, wherein a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the jointly configured resource indication value list.
The method according to claim 16, wherein the frequency domain resource allocation bitmap indicates frequency domain resources allocated for the terminal on one scheduled carrier, cell, or bandwidth part, or indicates frequency domain resources jointly allocated for the terminal on the plurality of carriers, cells, or bandwidth parts.
The method according to claim 16, wherein the preset condition comprises one or more of following:
a quantity of frequency domain resources in the frequency domain resource set being greater than or equal to a first preset value;

a ratio of the quantity of frequency domain resources in the frequency domain resource set to a quantity of allocable frequency domain resources on a carrier, cell, or bandwidth part being greater than or equal to a second preset value; and

frequency domain resources in the frequency domain resource set being discontinuous frequency domain resources.
The method according to claim 16, wherein a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource sets.
The method according to claim 16, wherein the index corresponding to the frequency domain resource set indicates that the frequency domain resource set is arranged in ascending order or descending order according to a length of a corresponding bitmap.
A frequency domain resource allocation method, applied to a network device and comprising:
sending second downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts, wherein

a frequency domain resource allocation field in the second downlink control information comprises an index corresponding to a frequency domain resource allocation bitmap or an index corresponding to a frequency domain resource set, and the frequency domain resource set meets a preset condition.
The method according to claim 25, wherein the method further comprises:
sending a resource indication value list configured for each scheduled carrier, cell, or bandwidth part, wherein the index represents a location of the frequency domain resource allocation bitmap in the resource indication value list.
The method according to claim 26, wherein a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the resource indication value list configured for each scheduled carrier, cell, or bandwidth part.
The method according to claim 25, wherein the method further comprises:
sending a resource indication value list jointly configured for the plurality of carriers, cells, or bandwidth parts, wherein the index represents a location of the frequency domain resource allocation bitmap in the jointly configured resource indication value list.
The method according to claim 28, wherein a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the jointly configured resource indication value list.
The method according to claim 25, wherein the preset condition comprises one or more of following:
a quantity of frequency domain resources in the frequency domain resource set being greater than or equal to a first preset value;

a ratio of the quantity of frequency domain resources in the frequency domain resource set to a quantity of allocable frequency domain resources on a carrier, cell, or bandwidth part being greater than or equal to a second preset value; and

frequency domain resources in the frequency domain resource set being discontinuous frequency domain resources.
The method according to claim 25, wherein a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource sets.
The method according to claim 25, wherein the index corresponding to the frequency domain resource set indicates that the frequency domain resource set is arranged in ascending order or descending order according to a length of a corresponding bitmap.
A terminal, comprising:
a first receiving module, configured to receive first downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts; and

a first processing module, configured to obtain, according to the first downlink control information, a quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and a frequency domain resource group corresponding to each bit, frequency domain resources allocated for the terminal on the plurality of carriers, cells, or bandwidth parts.
A network device, comprising:
a first sending module, configured to send first downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts, wherein

the first downlink control information is used to instruct a terminal to obtain frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to the first downlink control information, a quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and a frequency domain resource group corresponding to each bit.
A terminal, comprising:
a second receiving module, configured to receive second downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts; and

a thirteenth processing module, configured to obtain frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to a frequency domain resource allocation field in the second downlink control information, wherein

the frequency domain resource allocation field comprises an index of a frequency domain resource allocation bitmap or an index of a frequency domain resource set, and the frequency domain resource set meets a preset condition.
A network device, comprising:
a second sending module, configured to send second downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts, wherein

a frequency domain resource allocation field in the second downlink control information comprises an index of a frequency domain resource allocation bitmap or an index of a frequency domain resource set, and the frequency domain resource set meets a preset condition.
A communications device, comprising a processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, steps of the frequency domain resource allocation method according to any one of claims 1 to 32 are implemented.
A readable storage medium, wherein the readable storage medium stores a program, and when the program is executed by a processor, steps of the frequency domain resource allocation method according to any one of claims 1 to 32 are implemented.
A chip, wherein the chip comprises a processor and a communications interface, the communications interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement steps of the frequency domain resource allocation method according to any one of claims 1 to 32.
A communications device, wherein the communications device is configured to perform steps of the frequency domain resource allocation method according to any one of claims 1 to 32.
A computer program product, wherein the computer program product is executed by at least one processor to implement the frequency domain resource allocation method according to any one of claims 1 to 32.